LEFM 3xxCi User Manual
IB1406 Rev 12
Section 5
Page 29
August 2017
Figure 4.4 AC Power Terminations
Figure 4.5 Power Terminations
(TB1 has terminals 1 and 2 only –Safety earth/ground shown two places above)
User 1 and User 2 Inputs/Outputs
There are two groups of inputs/outputs in this transmitter. The groups are organized as User 1 and User 2.
Each user group is galvanically isolated from the other user group and from the incoming power supply.
Inputs/outputs within a user group have a common isolated ground. Accordingly, all inputs/outputs will be
listed according to the user group.
Analog Inputs (Terminal Block 2) – Recommended 16 to 28 AWG wire
TB2 contains the transmitter’s analog inputs, described below in Table 4.2. A typical schematic for the
analog inputs, including a depiction of the terminal block 2 configurations, is shown below in Figure 4.6.
Table 4.2 Analog Inputs (User 1)
Analog Input 1
TB2, Pin 3
4 to 20 mA (+)
TB2, Pin 4
4 to 20 mA (-)
Analog Input 2
TB2, Pin 5
4 to 20 mA (+)
TB2, Pin 6
4 to 20 mA (-)
Analog Input 3
TB2, Pin 7
4 to 20 mA (+)
TB2, Pin 8
4 to 20 mA (-)
